=== If no file names and line numbers are shown below, one can run
            addr2line -Cpfie my_exefile my_line_address
    to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.
    Or one can use amrex/Tools/Backtrace/parse_bt.py.

=== Please note that the line number reported by addr2line may not be accurate.
    One can use
            readelf -wl my_exefile | grep my_line_address'
    to find out the offset for that line.

 0: ./Castro3d.gnu.DEBUG.MPI.ex(+0x38cd7c) [0x556a225ddd7c]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:163:29

 1: ./Castro3d.gnu.DEBUG.MPI.ex(+0x38c9c6) [0x556a225dd9c6]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_BLBackTrace.cpp:71:8

 2: ./Castro3d.gnu.DEBUG.MPI.ex(+0x240b81) [0x556a22491b81]
    amrex::ParallelDescriptor::Abort(int, bool)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_ParallelDescriptor.cpp:230:22

 3: ./Castro3d.gnu.DEBUG.MPI.ex(+0x1f4335) [0x556a22445335]
    amrex::detail::Abort_host_doit(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:192:1

 4: ./Castro3d.gnu.DEBUG.MPI.ex(+0x2513f) [0x556a2227613f]
    amrex::Abort(char const*)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.H:125:5

 5: ./Castro3d.gnu.DEBUG.MPI.ex(+0x1f437e) [0x556a2244537e]
    amrex::Abort(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX.cpp:198:1

 6: ./Castro3d.gnu.DEBUG.MPI.ex(+0x4588c) [0x556a2229688c]
    amrex::Array4<double const>::index_assert(int, int, int, int) const
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_Array4.H:185:29

 7: ./Castro3d.gnu.DEBUG.MPI.ex(+0x3a6574) [0x556a225f7574]
    double const& amrex::Array4<double const>::operator()<double const, void>(int, int, int, int) const inlined at /raid/testing/castro-gfortran/AMReX//Src/AmrCore/AMReX_FluxRegister.cpp:154:17 in amrex::FluxRegister::SumReg(int) const
/raid/testing/castro-gfortran/AMReX//Src/Base/AMReX_Array4.H:79:20
amrex::FluxRegister::SumReg(int) const
/raid/testing/castro-gfortran/AMReX//Src/AmrCore/AMReX_FluxRegister.cpp:154:17

 8: ./Castro3d.gnu.DEBUG.MPI.ex(+0x1df124) [0x556a22430124]
    Castro::do_energy_diagnostics()
/raid/testing/castro-gfortran/Castro//Source/radiation/energy_diagnostics.cpp:48:30

 9: ./Castro3d.gnu.DEBUG.MPI.ex(+0x1c228) [0x556a2226d228]
    Castro::post_timestep(int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:1801:1

10: ./Castro3d.gnu.DEBUG.MPI.ex(+0x430912) [0x556a22681912]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2195:32

11: ./Castro3d.gnu.DEBUG.MPI.ex(+0x430c0e) [0x556a22681c0e]
    amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/AMReX//Src/Amr/AMReX_Amr.cpp:2439:26

12: ./Castro3d.gnu.DEBUG.MPI.ex(+0x76cdf) [0x556a222c7cdf]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:143:5

13: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f4bf5dae1a3]
    __libc_start_main
??:0

14: ./Castro3d.gnu.DEBUG.MPI.ex(+0x14cde) [0x556a22265cde]
    _start
??:0